Raggi, a member of the anti-establishment Five Star Movement, which won local elections in Rome and Turin in June, has long held that hosting the Olympics would waste money, leave Rome further in debt, and breed corruption.

Despite pressure from Rome 2024, Italian Olympic medalists and even the Italian prime minister Matteo Renzi, she effectively doomed Rome’s bid earlier in September by confirming her opposition.

“No to the Olympics of concrete, absolutely not!” she told reporters. “No to cathedrals in the desert,” she added, repeating her claim that Rome would saddled with redundant sports facilities.

Prior to conceding defeat, Rome 2024 tried to counter Raggi’s claims by insisting that its bid relied on only two new facilities being built, a water sports park and a cycling arena.

Rome would not have to spend city cash on anything, organisers said, because the national government would pay, adding that hosting the Games would bring investment and create 177,000 jobs.

The IOC is finding it harder to attract potential hosts as cities in developed countries are becoming increasingly reluctant to bid.

Anti-Olympics attitudes have been reinforced by recent academic research on the damaging effects hosting the Games can have.

Researchers at Said Business School, University of Oxford, calculated that from 1968 to 2016, every single Olympic Games ended up costing more than originally estimated. The average cost overrun is 156%.

A study by US academics Robert Baade and Victor Matheson this year found that in most cases the Olympics are a money-losing proposition.